Operation Manual

Table Of Contents
Individual phone configuration
106
Step by step
Contrast for the Octophon F640 key module
If an Octophon F640 key module is connected to your
Octophon F640, you can set contrast for it.
N Press the key shown.
Select and confirm the option shown.
Select and confirm the option shown.
if nec.
j Enter and confirm the User password.
Select and confirm the option shown.
Select and confirm the option shown.
Select and confirm the option shown.
gh Set and confirm the contrast.
Confirm the option shown.
Settings
User
Phone
Display
Key mod. contrast
Save & Exit